Question

(2x+2)² = -16
galera me ajudaaaaaaa aí por favor

Answer 1

2x=2elevado a 2- 16
2x=4-16
2x=-12
x=-12/2
x=-6

Answer 2

(2x + 2)² = -16

(2x + 2) * (2x + 2) = -16

4x² + 4x + 4x + 4 = -16
4x² + 8x +4 + 16 = 0
4x² + 8x + 20

Δ = b² - 4 * a * c

Δ = 8² - 4 * 4 * 20
Δ = 64 - 320
Δ = -256

$x = \frac{-b + / - \sqrt{Delta} } {2 * a}$

$x = \frac{-8 + / - \sqrt{256} }{2*4}$

$x = \frac{- 8 + / - 16}{8}$

x1 = $\frac{-8 + 16}{8} = \frac{8}{8} = 1$

x2 = $\frac{-8 - 16 }{8} = \frac{-24}{8} = -3$

Resposta: -3

(2 * -3 + 2)² = ?

(-6 + 2)²
-4² = -16